The judge in the trial of two of Nigella Lawson's former aides has instructed the jury to ignore comments made by the Prime Minister about the celebrity cook.

He appeared to be referring to David Cameron's interview with the Spectator in which he admitted to being a member of 'Team Nigella' - the name of a campaign started by her fans.

Judge Robin Johnson said the defendants "feel aggrieved" by the Prime Minister's remarks, which are "favourable to Ms Lawson".

Elisabetta Grillo, 41, and sister Francesca, 35, are accused of abusing their positions by spending £685,000 on credit cards belonging to the celebrity couple to buy designer goods and luxury holidays for themselves.

In his interview with Spectator editor Fraser Nelson, the Prime Minister was asked if he was on Team Nigella, to which he replied "I am".

"I’m a massive fan," he said, adding: "I’ve had the great pleasure of meeting her a couple of times and she always strikes me as a very funny and warm person, but I’m also an amateur cook and I like like her recipes."

The jury also heard evidence from Elisabetta who claimed to have seen evidence of drug use by Nigella Lawson, including a packet of "white powder".